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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdint.h>
#include <arch/io.h>
#include <arch/acpi.h>
#include <cbmem.h>
#include "SBPLATFORM.h"
#if !ENV_RAMSTAGE || IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
int acpi_get_sleep_type(void)
{
u16 tmp = inw(PM1_CNT_BLK_ADDRESS);
tmp = ((tmp & (7 << 10)) >> 10);
return (int)tmp;
}
#endif
void backup_top_of_low_cacheable(uintptr_t ramtop)
{
u32 dword = ramtop;
int nvram_pos = 0xf8, i; /* temp */
for (i = 0; i < 4; i++) {
outb(nvram_pos, BIOSRAM_INDEX);
outb((dword >> (8 * i)) & 0xff, BIOSRAM_DATA);
nvram_pos++;
}
}
uintptr_t restore_top_of_low_cacheable(void)
{
u32 xdata = 0;
int xnvram_pos = 0xf8, xi;
for (xi = 0; xi < 4; xi++) {
outb(xnvram_pos, BIOSRAM_INDEX);
xdata &= ~(0xff << (xi * 8));
xdata |= inb(BIOSRAM_DATA) << (xi *8);
xnvram_pos++;
}
return xdata;
}
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